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Awashimaura Dolerites (Chihara and Nishida, 1972) Kato, 1981

Invalid synonym: Awashima Dolerites

• Type locality: Hatazaki, Awashimaura city, Iwafune county, Niigata prefecture
• Intrusive rocks
• late Miocene
• Intruded in: Awashima Formation, Cretaceous granite

• Lithofacies: Alkaline basalt series
• Lithofacies: Dykes, Sills
• Lithofacies: Basalt, Dolerite, Gabbro
• Lithofacies: Olivine-bearing clinopyroxene plagioclase dolerite

• Thickness: several cm - 100 m or thicker
• Upper limit: Unconformity (Higher Terrace Deposits)

• Distribution: Hatazaki, Awashimaura city, Iwafune county, Niigata pref.

• Kato (1981) Geology of the Awashima District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 32p. (in Japanese with English abstract 3p.)